In this week’s issue of PEOPLE, the rocker reminisced on their past collaboration, revealing he still keeps up with the Keeping Up with the Kardashians maven — and that they’ve bonded over their sons, who share the same name.

“I stay in touch with her a little bit — just emails here and there,” says Wentz, 38, who is currently on a world tour with Fall Out Boy, which will release its seventh album, Mania, on Friday. “I ran into her, and she was probably the nicest person ever. She’s exactly the same as she was then, except she’s, like, a trillion times more famous.”

For much more on Pete Wentz, pick up the new issue of PEOPLE, on newsstands everywhere Friday.

Saint, Pete and Bronx Wentz and Meagan CampeKoury Angelo

Over the years, the Wentz and Kardashian West clans have even exchanged thoughtful gifts.

“We ran into her right after her Saint was born, and we’d sent her some boots that had his initials on them,” adds Wentz, who adds their A-list pals returned the favor — with West’s Adidas line! “She sent Saint Yeezys and that kind of stuff. Very sweet.”

And Wentz dreams of a future musical collaboration between their similarly named sons: “I hope they start a band one day or something!” he says.